56 lines
1.5 KiB
Ruby
56 lines
1.5 KiB
Ruby
# frozen_string_literal: true
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class DraftSequence < ActiveRecord::Base
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def self.next!(user, key)
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return nil if !user
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user_id = user
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user_id = user.id unless user.is_a?(Integer)
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return 0 if !User.human_user_id?(user_id)
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sequence =
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DB.query_single(<<~SQL, user_id: user_id, draft_key: key).first
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INSERT INTO draft_sequences (user_id, draft_key, sequence)
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VALUES (:user_id, :draft_key, 1)
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ON CONFLICT (user_id, draft_key) DO
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UPDATE
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SET sequence = draft_sequences.sequence + 1
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WHERE draft_sequences.user_id = :user_id
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AND draft_sequences.draft_key = :draft_key
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RETURNING sequence
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SQL
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DB.exec("DELETE FROM drafts WHERE user_id = :user_id AND draft_key = :draft_key AND sequence < :sequence", draft_key: key, user_id: user_id, sequence: sequence)
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sequence
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end
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def self.current(user, key)
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return nil if !user
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user_id = user
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user_id = user.id unless user.is_a?(Integer)
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return 0 if !User.human_user_id?(user_id)
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# perf critical path
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r, _ = DB.query_single('select sequence from draft_sequences where user_id = ? and draft_key = ?', user_id, key)
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r.to_i
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end
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end
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# == Schema Information
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#
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# Table name: draft_sequences
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#
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# id :integer not null, primary key
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# user_id :integer not null
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# draft_key :string not null
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# sequence :bigint not null
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#
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# Indexes
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#
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# index_draft_sequences_on_user_id_and_draft_key (user_id,draft_key) UNIQUE
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#
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